Keep possession 3v1 with clean one and two touch passing. Support on an angle, receive across the body, and pass firmly to the correct foot.
Mark a small triangle about 8 to 10 yards a side. Three attackers take a corner each, one defender in the middle. Keep the ball with a maximum of two touches; count consecutive passes. When the defender wins it or it leaves the area, the attacker responsible goes in. Progress to one touch and then a smaller triangle.
The 3v1 rondo is where every possession session in football should begin, and it is the one version young players can genuinely succeed at. Three against one is a big enough overload that the ball stays alive long enough for habits to form, which is exactly what a seven or eight year old needs and exactly what a 4v2 denies them.
The whole exercise turns on one thing: the angle. A player standing flat behind the defender has taken himself out of the game without moving, because there is no lane to him. A player who shifts two yards to the side has created one. Young players do not do this instinctively, and telling them to move is useless. Telling them to always be able to see the ball without looking through the defender works, because it gives them something they can check for themselves.
First touch is the second thing. Received across the body and slightly away from the defender, the next pass is already available. Received flat onto the front foot, the player has to take a second touch to get out of trouble, and against one defender in a tight triangle that second touch is usually where possession ends.
Pass weight is the third and the least coached. Too soft invites the interception. Too hard and a young player cannot control it. Firm and to the back foot is the standard to hold them to, and it is worth stopping the exercise for, because pace on the pass is what makes every rondo above this one possible.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.